I personally use uchi matas, double legs and foot sweeps the most. I've started going for some sacrifice throws where you grip the belt. ( Don't know most names in Japanese though...
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However, sacrifice throws can be very perilous for the thrower in BJJ as many have a very low crouching stance and many also spazz in the standup and get all defensive. This makes it easy to miss the more technical throws and it makes you end up in bottom sidemount.